The King of Queens alum makes more damning claims about Scientology, as well as Tom Cruise, one of the church's most prominent members, in a sit-down with20/20 that is scheduled to air Friday.

"As time goes on, you start to lose touch with the real world. The mindset becomes 'us against them,'" Remini tells 20/20 of her time in the church, which she joined along with her family as a young girl. "The decision to leave is you are giving up everything you have ever known and everything you have worked for your whole life."